With an output of 7.5 W at 110 V this circuit was found in a 1968 Motorola documentation. The circuit has an operating range of 95 to 2 000 Hz.
The project that we present below is very interesting, serving to identify remote calls such as in...
This circuit was found in a Dutch documentation from 1970. The circuit makes use of semiconductors that...
This amplifier with an OTA has a gain of 40 dB. The power supply must be symmetrical. Found in...